Used 1/2 Gal Stainless Steel Reactor rated 5000 PSI @ 650 deg F. Jacket rated 150 PSI @ 650 deg F. 4" dia X 10" Straight Side. With anchor type agitator (no drive). Shell thickness: 15/16"; Head thickness: 2". Built by Zeyon, S/N: AP6811. Stamped: U, PA. Spec 3247.